Choi, Jun M. Ph.D., Purdue University, May 2015. Near-inertial internal Poincaré waves in Lake Michigan: Seasonal variability and effects on lateral dispersion and turbulent mixing. Major Professor: Cary D. Troy. A dominant physical process in stratified Lake Michigan is near-inertial internal Poincaré waves. The near-inertial internal Poincaré waves is described as locally quasi-uniform curren...

Context. This is the fourth in a series of papers that deal with angular momentum transport by internal gravity waves in stellar interiors. Aims. Here, we want to examine the potential role of waves in other evolutionary phases than the main sequence. Methods. We study the evolution of a 3 M⊙ Population I model from the pre-main sequence to the early-AGB phase and examine whether waves can lead...

It was shown recently that three different types of short-period Internal Wave SAR signatures occur on the Iberian Shelf depending on parameters of surface-active films. Large scale modulation of film characteristics by currents associated with internal tidal waves can also produce a signature in ERS SAR images. On the Western Iberian shelf short-period IWs typically propagate in groups of pack...

Large amplitude internal waves are commonly observed in the coastal ocean. In the weakly nonlinear long wave régime, they are often modeled by the Korteweg-de Vries equation, which predicts that the long-time outcome of generic localised initial conditions is a train of internal solitary waves. However, when the effect of background rotation is taken into account, it is known from several theor...

Internal tides have been implicated as a major source of mechanical energy for mixing in the ocean interior. Indeed, microstructure and tracer measurements have indicated that enhanced turbulence levels occur near topography where internal tides are generated. However, the details of the energy budget and the mechanisms by which energy is transferred from the internal tide to turbulence have be...

The generation of internal waves in the equatorial undercurrent is studied using a large-eddy simulation (LES) model. The model is forced with a constant easterly windstress and diurnal heating and cooling. Internal waves are generated with typical horizontal wavelengths of about 250 m, consistent with observations and comparable to the wavelengths of the most unstable modes from linear instabi...

A dual-polarization lidar and photography are used to sense internal waves in West Sound, Orcas Island, Washington, from a small aircraft. The airborne lidar detected a thin plankton layer at the bottom of the upper layer of the water, and this signal provides the depth of the upper layer, amplitude of the internal waves, and the propagation speed. The lidar is most effective when the polarizat...

[1] High-resolution measurements of near-bottom temperature stratification and current velocity were performed on the sloping boundary of a large lake at the depth of the seasonal thermocline. The measurements cover nearly the entire stratified period and reveal the periodic occurrence of strong temperature and current velocity fluctuations, which can be attributed to shoaling high-frequency in...

The present paper studies the possibility of propagation of torsional surface waves in a non-homogeneous isotropic crustal layer lying over a viscoelastic mantle. Both rigidity and density of the crustal layer are assumed to vary exponentially with depth. Separation of variable method has been used to get the analytical solutions for the dispersion equation for the torsional surface waves. Furt...

[1] Near-inertial ( 18 hours) internal waves were observed in the mid-western part of the East Sea on May 18 and 19, 2004 using C-band Synthetic Aperture Radar (SAR) images. Current and temperature measurements obtained during the field experiment from 10 May to 9 June 2004 (IWXES2004, Internal Wave eXperiment in the East Sea), were analyzed to investigate the processes by which near-inertial i...